The MAX11080 is a battery-pack fault-monitor IC capable of monitoring up to 12 lithium-ion (Li+) battery cells. This device is designed to provide an overvoltage or undervoltage fault indication when any of the cells cross the user-selectable threshold for longer than the set program-delay interval. The overvoltage levels are pin selectable from +3.3V to +4.8V in 100mV increments, and have a guaranteed accuracy of ±25mV over the entire temperature range. The undervoltage level is also user selectable from +1.6V to +2.8V in 200mV increments. These levels are guaranteed to ±100mV over the entire temperature range. Undervoltage detection can be disabled as one of the user-configuration options.
The MAX11080 has a built-in level-shifter that allows up to 31 MAX11080 devices to be connected in a daisy-chain fashion to reduce the number of interface signals needed for large stacks of series batteries. Each cell is monitored differentially and compared to the overvoltage and undervoltage thresholds. When any of the cells exceeds this threshold for longer than the set program delay interval, the MAX11080 inhibits the heartbeat signal from being passed down the daisy chain. Built-in comparator hysteresis prevents threshold chattering. The MAX11080 is designed to be the perfect complement to the MAX11068 high-voltage measurement IC for redundant fault-monitoring applications. This device is offered in a 9.7mm x 4.4mm, 38-pin TSSOP package with 0.5mm pin spacing. The package is lead-free and RoHS compliant with an extended operating temperature range of -40°C to +105°C.
Key Features
Applications/Uses
Up to 12-Cell Li+ Battery Voltage Fault Detection
Operation from 6.0V to 72V
Pin-Selectable Overvoltage Threshold from +3.3V to +4.8V in 100mV Increments
±25mV Overvoltage Detection Accuracy
Pin-Selectable Undervoltage Threshold from +1.6V to +2.8V in 200mV Increments
* Some packages have variations, listed on the drawing. "PkgCode/Variation" tells which variation the product uses. Note that "+", "#", "-" in the part number suffix describes RoHS status. Package drawings may show a different suffix character.
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MAX11080
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TYPE PINS FOOTPRINT
DRAWING CODE/VAR *
Temp
RoHS/Lead-Free? Materials Analysis
MAX11080EVKIT
Active
Land Pattern: Not Available
See data sheet
MAX11080EVKIT+
Active
Land Pattern: Not Available
See data sheet
MAX11080GUU+
Active
TSSOP;38 pin;63.7 mm²
Outline Drawing: 21-0081 (PDF)
Land Pattern: 90-0140 (PDF)
Use pkgcode/variation: U38+1*
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